The getJSON function does not remove the scripts added to head when using a callback (for jsonp). This of course means that you get a build up of markup if you're using the getJSON function (with callback) to poll a resource.
Someone called Tom had noticed this before, but the discussion was not resolved. I would have replied to this thread but there didn't seem to be an option to post to the group, only to the individuals involved in the discussion. http://groups.google.com/group/jquery-en/browse_thread/thread/5de2eeeb835711a6/c375846e20dec5bd?lnk=gst&q=getjson+remove+scripts John, who replied to Tom, was wrong in that the jQuery code has a condition that prevents head.removeChild( script ) being reached if using jsonp (i.e. if the jsonp variable is set). It looks like this is by design, presumably because there's no way of knowing when the callback has finished its work. Can someone please confirm this or provide further details? Many thanks. P.S. As a temporary work-around, I've added the following to the end of my callback function, which removes the last script tag added to the head when it's finished its work. $("head script:last-child").remove();